e = e.pair.next;
} while(e != this.e);
-
// FIXME: intersection test needed?
- return true;
+ boolean good = true;
+ for(T t : Mesh.this) {
+ if (!good) break;
+ e = this.e;
+ do {
+ if (!t.has(e.p1) && !t.has(e.p2) && e.t != null && e.intersects(t)) { good = false; break; }
+ e = e.pair.next;
+ } while(e != this.e);
+ }
+ return good;
}
public boolean move(Vec v) {
}
public class BindingGroup {
- private HashSet<E> ess = new HashSet<E>();
- public BindingGroup() { }
- public BindingGroup(E e) {
- ess.add(e);
- }
+ private HashSet<E> set = new HashSet<E>();
+ public BindingGroup bind_others;
+ public BindingGroup other() { return bind_others; }
+ public BindingGroup(BindingGroup bind_others) { this.bind_others = bind_others; }
+ public BindingGroup() { this.bind_others = new BindingGroup(this); }
+ public BindingGroup(E e) { this(); set.add(e); }
public void add(E e) {
- if (e.bg != null) {
- for(E ex : e.bg.ess) {
- ex.bg = null;
- add(ex);
+ if (set.contains(e)) return;
+ for (E epeer : e.bind_peers.set) {
+ epeer.bind_peers = this;
+ epeer.bind_to = bind_others;
+ set.add(epeer);
+ }
+ for (E eother : e.bind_to.set) {
+ bind_others.add(eother);
+ }
+
+ for(E eother : bind_others.set) {
+ if (e.next.bind_to.set.contains(eother.prev)) {
+ e.next.next.bindEdge(eother.prev.prev);
}
- } else {
- ess.add(e);
- e.bg = this;
}
+
}
public void dobind(E e) {
- for(E ex : ess) {
- if (ex==e) continue;
- e.p1.bind(ex.p1);
- e.p2.bind(ex.p2);
+ for(E ebound : set) {
+ e.p1.bind(ebound.p2);
+ e.p2.bind(ebound.p1);
}
}
public void shatter(BindingGroup bg1, BindingGroup bg2) {
- for(E e : ess) {
+ for(E e : set) {
e.shatter(e.midpoint(), bg1, bg2);
}
}
E prev; // previous half-edge
E next; // next half-edge
E pair; // partner half-edge
- public BindingGroup bg = new BindingGroup(this);
+ public BindingGroup bind_peers = new BindingGroup(this);
+ public BindingGroup bind_to = bind_peers.other();
boolean shattered = false;
public int compareTo(E e) { return e.length() > length() ? 1 : -1; }
-
- public void bindEdge(E e) {
- e.pair.bg.add(this);
- }
- public void dobind() { if (bg != null) bg.dobind(this); }
+ public void bindEdge(E e) { bind_to.add(e); }
+ public void dobind() { bind_to.dobind(this); }
public Point shatter() { return shatter(midpoint(), null, null); }
public Point shatter(Point mid, BindingGroup bg1, BindingGroup bg2) {
if (bg1==null) bg1 = new BindingGroup();
if (bg2==null) bg2 = new BindingGroup();
- bg.shatter(bg1, bg2);
+ bind_peers.shatter(bg1, bg2);
+ bind_to.shatter(bg2.other(), bg1.other());
pair.shatter();
destroy();
prev.t = null;
pair.next.t = null;
pair.prev.t = null;
- this.bg = null;
- pair.bg = null;
+ /*
+ this.bind_to = null;
+ pair.bind_to = null;
+ this.bind_peers = null;
+ pair.bind_peers = null;
+ */
pair.prev.next = next;
next.prev = pair.prev;
prev.next = pair.next;
this.prev.next = this;
this.next.prev = this;
this.pair.pair = this;
+ bind_peers.add(this);
if (this.next.p1 != p2) throw new Error();
if (this.prev.p2 != p1) throw new Error();
if (this.p1.e == null) this.p1.e = this;